User blog comment:Lathagarr Stormgale of Tronn/Q&A/@comment-2006360-20101201202608/@comment-3143419-20101203160208

Speaking in tongues as mentioned in the Bible meant that the Apostles were able to communicate with the people. The Apostles themselves were most likely speaking in Aramaic. It says that the people could hear it in their own language, not that the Apostles were speaking in their tongue.